Wire drawing drum



y 1933- E. J. MOILVRIED WIRE DRAWING DRUM Filed March 2, 1931 Iapparatus,

, grooves belng formed Patented May 16, 1933 UNITED STATES.

PATENT OFFICE EDWIN J. MCILVRIED, 0F AKRON, OHIO, ASSIGNOR TO THE VAUGHNMACHINER Y COM- PANY, OF CUYAHOGA FALLS, OHIO, A. CORPORATION OF OHIOWIRE DRAWING DRUM Application filed March 2, 1981. Serial No. 519,383.

This invention relates to wire drawing and more particularly to thatpart of the apparatus which is known as the wire drawing drum orcapstan.

In wire drawing machines of the type in which the wire is wrapped arounda rotatable drum to draw the same through a die, it has been customaryto design these machines so that, in operation, there will be someslippage between the wire and the surface of the drum. Accordingly,during ordinary use of a machine of this kind the surface of the drum issubjected to considerable wear, frequently resulting in which tend tocause breakage of the wire. To restore the surface of the wire drawingdrum to a smooth condition forefiicient operation, it has heretoforebeen necessary to remove the drum from the machine to either apply a newwear strip to the drum surface, or to subject the drum surface tomachining operations. The removal of the drum from the machine for thepurpose of reconditioning its wire contacting surface requiresconsiderable time and effort and, in addition, renders the machineinoperative and unproductive for a considerable period of time.

It is therefore an object of this invention to provide a novel wiredrawing drum having a wire contacting surface which can be renewed orreconditioned without the need of disconnecting orremovingthe drum fromthe wire drawing machine.

Another object of this invention is to provide a wire drawing drumembodying novel means for retaining or anchoring a renewable wear stripin place on the drum.

A further object of this invention is to provide a wire drawing drum ofthe type having a renewable wear strip in which novel means is employedfor anchoring the ends of said strip. I

Other objects and advantages of the invention will be apparent from thefollowing description, taken in conjunction with the accompanying sheetof drawing, in which Figure 1 is a top plan view of a wire drawingmachine embodylng my inventlon;

2 is a sectional view of the wire Fig.

drum taken on line 22 of Fig.

drawing 1; and

Fig. 3 is a partial sectional view taken in the direction indicated bythe line 3-3 of Fig. 2.

In the drawing to which detailed reference will presently be made, Ihave shown the preferred form of my wire drawing drum for purposes ofillustration, but it will be understood, of course, that my invention isnot to be regarded as being limited in scope to the particulararrangement of structure illustrated and described.

In Fig. l of the drawing, I have re resented one formlof wire drawingmac ine in which my invention may be used, but obviously the principleof my invention may be used to advantage in any wire drawing machine ofthe type employing a rotatable drum for drawing the wire through a die.

The wire drawing machine shown inFig. 1 is rovided with the usual casing10f or housing the gearing, or similar mechanism, which actuates therotatable wire drawing drum or capstan 11. The drum illustrated .in thisinstance is of the type having a pludrum. A take-up device in the formof a.

spool or reel 14 driven by suitable mechanism, is provided for winding.the strand of wire being delivered from the drawing drum.

My invention has to do with the drawing drum itself, and as will behereinafter explained in detail, is so constructed that when thewire-contacting surface thereof becomes worn it can be renewed andrestoredto an efficient operating condition without the need of removingthe drum from the Wire drawing machine or rendering the latterinoperative for any great length of time. Ac-

cording to my invention, this drum com prises a body portion 15 ofsuitable material, such as cast iron, having a. central opening 16 intowhich a drive shaft or arbor may extend. In this instance, the drumbeing of the step or cone type, it is formed with a plurality ofcylindrical surfaces or sections 1'? of different diameters, each ofwhich is disposed between two radially extending flanges 18. Theseflanges are provided for the purpose of preventing the wire from jumpingoff the respective drum surfaces, and also to retain in. place therenewable bands or wear strips 19 which are clearly shown in the drawingas extending circumferentially of these drum surfaces. These wear stripsare preferably made of a material which is harder "than the material ofthe drum, such as hardened steel, and provide each of the cylindricalsections of the drawing drum with a renewable wear resisting surface.

For securing or anchoring the ends of the wear strips in such a. mannerthat the strips can be readily removed or applied to the drum withoutdismounting the latter from the wire drawing machine, I provide recesses20 into which the inturned hook-like ends 21 of the wear strips extend.These re cesses are formed in the respective cylindrical surfaces 17between the pairs of radially extending flanges 18. The inturned ends ofthe wear strips are retained or anchored in the respective recess byfilling each of the latter with a body of lead or suitable nonferrousalloy which is indicated by the reference character 22. To assist inretaining the congealed metal bodies in the recesses 20, the side walls23 of the latter are preferably undercut or oppositely inclined asclearly shown in Fig. 2 of the drawing.

In applying a wear strip 19 to one of the surfaces of the drum, thestrip is wrapped around the drum with its ends 21 extending into therecess 20. While they wear strip-is held in this position a. quantity oflead or non-ferrous alloy, in a fused state, is poured into the recessand allowed to congeal to anchor the ends of the wear strip in place, asshown=-in Fig.- 2. When the strip wears and it becomes necessary toreplace the same, the body of lead or alloy 22- may be chipped out, butpreferably heated, as by means of a blow torch, to fuse the metal andrelease the inturned ends of the strip. After the worn strip has beenremoved, it is simply necessary to wrap the new strip around the drumsurface and insert the ends 21 into the recess 20 which is then filledwith the lead or alloy.

It will be seen from the arrangement of structure which I haveillustrated and de-- scribed that I have provided a novel form of wiredrawing drum having a surface which can be restored to efficientoperating and means for anchoring said wear reoaars condition withoutneed of removing the drum from the machine. It will also be seen thatwith the novel securing means which I have provided for the ends of thewear strip, it is not necessary to accurately measure or determine thelength of wear strip to be fitted to the drum surface be cause the exactlocation of the ends 21 in the recess is unessential so long as theseends do not engage each other and cause the strip to bulge away from thedrum surface. The anchorage of the wear strip which I have providedretains a strip tightly in place on the drum surface in such a way thatthe driving force of the drum will be efficiently transmitted to thewire to be drawn, and since the metal, in which the ends of the wearstrip are embedded, is soft and adapted to be readily fused or chipped,the strip can be quickly and easily removed and replaced. withoutdismounting the drum.

While I have illustrated and described the device of my invention in adetailed manner, it should be understood, however, that I do not intendto limit myself to the precise details of construction illustrated anddescribed, but regard my invention as including such changes andmodifications as do not involve a departure from the spirit of theinvention and the scope of the appended claims.

Having thus described my invention, I claim:

1. A wire drawing drum having an annular surface with a recess therein,a wear strip engaging said annular surface and having securing meansdisposed in said recess, and a body of readily fusible congealed metalin said recess, for' anchoring said securing means.

2. A wire drawing drum having an annular surface provided with a recess,a body of fusible metal in said recess, tending circumferentially ofsaid annular surface and having intiirned ends embedded in said body offusible metal.

3. The combination with a wire drawing drum having an annular surfacewith a recess therein, of a renewable wear strip extendingcircumferentiallybf said surface, and means for anchoring said wearstrip to said drum whereby stri placement can beeifecte withoutrequiring demounting of the drum or access to the interior thereof, saidanchoring means comprising a body of solidified material disa. wearstrip exremoval and reposed in said recess, and securing means eX- drumhaving an annular surface with a rev cess therein, of a renewable wearstrip extending circumferentially of said surface, strip to said' drumcomprising a body of fusible metal disposed in said recess and havingportions of said strip embedded therein.

5. A wire drawing drum having an annular surface with an undercut recesstherehaving securing means embedded in said material.

6. A wire drawing drum having spaced annular shoulders and an annularsurface between said shoulders, said annular surface having a recesstherein, a body of solidified material in said recess, and a wear stripextending circumferentially of said surface between said shoulders andhaving securing means embedded in said material.

7. A wire drawing drum having a plurality of annular surfaces ofdifferent diameters, each of said surfaces having a recess therein, abody of solidified material in each recess, and a wear strip extendingcircumferentially of each of said surfaces and having securing meansembedded in the solidified material.

8. A wire drawing drum comprising a metal body having an annular surfacewith a recess therein, a wear strip engaging said annular surface andhaving securing means extending into said recess, and a body ofcongealed metal in said recess with said securing means embeddedtherein, said congealed metal being fusible at a lower temperature thanthe metal of the first mentioned body.

In testimony whereof, I

my signature.

EDWIN J. MCILVRIED hereunto aflix

